Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>Assignment>Q 20

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Earn 100

Draw the ray diagram for formation of primary rainbow.

Important Questions on Ray Optics and Optical Instruments

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>EXERCISE>Q 24

If in a plano-convex lens the radius of curvature of the convex surface is

10 cm

and the focal length of the lens is

30 cm

, the refractive index of the material of the lens will be :

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>Assignment>Q 27

A curved surface is convex to the incident beam of light. Does it form real image? Draw the ray diagram.

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>Assignment>Q 11

A microscope is focused on a coin lying at the bottom of a beaker. The microscope is now raised up by

1 cm .

To what depth should the water be poured into the beaker so that coin is again in focus? (Refractive index of water is

\frac{4}{3})

.

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>Assignment>Q 15

The least distance between a point object and its real image formed by a convex lens of focal length

F

is

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>Assignment>Q 24

A thin equiconvex glass lens of refractive index

1.5

has power of

5 D .

When the lens is immersed in a liquid of refractive index

μ,

it acts as a divergent lens of focal length

100 cm .

The value of

μ

of liquid is

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>Assignment>Q 6

A spherical convex surface of radius of curvature

\frac{2}{9} m

separates two media of refractive index

\frac{4}{3}

and

\frac{3}{2} .

If an object is kept in first medium at infinity then the position of image from spherical surface is

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>Assignment>Q 41

In the diagram, a ray is passing through a broken prism, find angular deviation for the ray

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Gamma Question Bank for Medical Physics>Chapter 26 - Ray Optics and Optical Instruments>Assignment>Q 51

The near point of a person is

75 cm .

In order that he may be able to read book at a distance

30 cm .

The power of spectacles lenses should be